How to switch colors on Base Color Image Texture Node?
Material Nodes
For switching simple image you can try something like this ...



Compositor Nodes
But for your texture would be better use Compositor with some Matte nodes to extract colors more accurately (or use any other image editor that supports color selection).

Yellow-Braun

separate color by Matte node, Desaturate, Invert, ColorRamp to adjust final black color

Grey

separate color by Matte node, Invert, RGB Curves or Color Mix node to make it yellow

After that, mix them together with Alpha Over node on top of original image where are stored Blue Black and red parts of texture. Save and use as texture in material.
version 01

version 02


Notes:

To get more freedom in adjustments could be better assign material to different parts of the mesh as unique material (with the same textures). Like that you can easier to let rid of yellow lines on black surfaces just without need to mask texture since material is assign just to that part and not the others.

Anyway I highly recommend to use some image editor than node system. In Photoshop could be done with masked yellow-braun layer, and grey layer, recolored above original, just in a few minutes. Only two layers, each with just two adjustment layers. And easily adjust mask manually for some details if needed.